What kind of fuel injection system does Mercedes Benz use?
. The fuel injection system used on all Mercedes-Benz gasoline engine vehicles uses a basic CIS injection system for fuel delivery and electronic controls for mixture correction functions.
Do you need constant fuel pressure to run a Mercedes?
Mercedes-Benz engines need constant fuel pressure to run correctly. If your engine is giving you trouble it might be time to replace your fuel pumps. Everything you need to do the job is contained in this article.
What does a high resistance injector circuit mean?
Injector circuit high resistance (internal, wiring/connectors). Regardless of the exact cause, higher resistance means less current flow; less current flow means slower opening and decreased pintle travel, which in turn means less fuel flow. Low resistance.
How does the idle speed of a Mercedes Benz work?
* The nominal idle speed is controlled depending on temperature, between 1200 RPM at about -23°F (-30°C) to 900 RPM at 158°F (70°C). * With the ignition switched on (engine not running) the idle speed air valve is activated by a specific voltage.
What kind of fuel injection does Mercedes use?
Mercedes suggests that special tools are required to adjust the mixture on the Bosch KE3-Jetronic (CIS-E) fuel injection, such as is used on the 1988-91 560 series motors. The dedicated shade tree mechanic cando it, but needs to be well-informed first.
Which is the correct way to adjust Bosch Jetronic mixture?
Even quarter-turns may be too much, so be careful! Turning the adjusting screw clockwise makes the mixture richer, while CCW makes it leaner. Don’t leave the wrench in the adjusting device (#2, above) when you start the engine, or it may fly out. To adjust, depress the wrench just enough to engage the adjusting screw (#61) and turn it slowly.
Do you need to remove anti tamper device for Bosch Jetronic mixture adjustment?
The dedicated shade tree mechanic cando it, but needs to be well-informed first. These adjustments are intended to be followed by an actual exhaust gas CO check to ensure legality. In order to reach the adjusting screw one must first remove the anti-tamper device required on US cars by Federal law.
How does duty cycle work on Bosch fuel injection?
It is suggested that before the active (engine-running) tests are attempted, some static tests should be performed to check a few of the basic components of the Bosch fuel injection controller. With the ignition on but the engine not running, the duty cycle tells which version of controller is installed.
How many fuel pumps does a Mercedes 560 have?
If the fuel pump relay receives the number impulses corresponding to the maximum engine RPM, the contact between circuit 30 and 87 is interrupted and the fuel pump is turned off. The 420 and 560 models are equipped with 2 fuel pumps. All other models use one pump.
What does W126 stand for in Mercedes Benz?
The W126 was a group of S-Class vehicles that brought about several improvements in ride, handling and fuel economy. The S-Class vehicle was a special designation to stand for the best of the luxury sedans on the market.
What do you need to know about Mercedes wiring?
These Mercedes Wiring information / Aftermarket Autostart/Alarm Technical Wiring Diagrams are very useful, if not required, for the installation of alarms, autostart / alarms, remote starts, doorlock info and any other aftermarket installation that would require you to know the / Wire Information / Wiring Information of your Mercedes